15x23 puzzle
Time:
1
2
2
2
1
2
2
3
2
2
1
1
3
4
8
1
3
4
1
5
3
4
7
3
5
8
3
7
9
12
10
2
3
5
7
7
1 4
3
4 4
5 4
1 2 3
2 8
11
7
1 8
1 7
1 1
2 1
3 2
2 2
5
3
3
Opacity:
Original image